C++ codes are not submitting

I don't know what is going wrong with my following code for the problem Life, the Universe, and Everything.
When i submitted this code in python it is accepted. But when I am submiiting any problem using C++ compiler then it is not getting submitted and browser is loading...
Plz let me know what is wrong??

#include <iostream>
using namespace std;

int main() {
	
	// your code here
	int a;
	while(1)
	{
		cin >> a;
		if(a==42)
			break;
		cout << a << endl;
	}

	return 0;
}